CN113105662A - PET liquid composite silica gel sheet and preparation method thereof - Google Patents
PET liquid composite silica gel sheet and preparation method thereof Download PDFInfo
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- CN113105662A CN113105662A CN202110386388.3A CN202110386388A CN113105662A CN 113105662 A CN113105662 A CN 113105662A CN 202110386388 A CN202110386388 A CN 202110386388A CN 113105662 A CN113105662 A CN 113105662A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 157
- 239000000741 silica gel Substances 0.000 title claims abstract description 142
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 142
- 239000007788 liquid Substances 0.000 title claims abstract description 120
- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 36
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 15
- 239000001257 hydrogen Substances 0.000 claims abstract description 15
- 239000003112 inhibitor Substances 0.000 claims abstract description 15
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 15
- 229920002545 silicone oil Polymers 0.000 claims abstract description 15
- 239000003292 glue Substances 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 95
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 95
- 238000001035 drying Methods 0.000 claims description 22
- 238000012360 testing method Methods 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000009966 trimming Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 4
- 230000037303 wrinkles Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- 229920002799 BoPET Polymers 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000000499 gel Substances 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- 238000013329 compounding Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000004073 vulcanization Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/08—Printing inks based on natural resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention discloses a PET liquid composite silica gel sheet and a preparation method thereof, the PET liquid composite silica gel sheet comprises a PET original film and liquid silica gel coated on the surface of the PET original film, and the liquid silica gel comprises the following raw material components in parts by weight: 980 portions and 1020 portions of silica gel-based glue; 8-10 parts of hydrogen-containing silicone oil; 2-4 parts of color paste; 0.4-0.6 part of inhibitor; 2.5-3.5 parts of platinum catalyst; and coating a layer of treating agent on the PET original film, coating liquid silica gel on the treating agent, and adhering the liquid silica gel to the surface of the PET original film under the action of the treating agent. The PET liquid composite silica gel sheet is formed by compounding and fixing the PET original film and the liquid silica gel, has ideal characteristic effects of hardness, tensile strength, tearing strength, elongation at break and the like, and has excellent waterproof effect. The PET liquid composite silica gel sheet can be directly stamped and attached by equipment, is simple to process, realizes automatic attachment, does not need manpower, and has extremely high assembly efficiency. The PET liquid composite silica gel sheet with the coiled material structure is convenient to store, carry and the like.
Description
The technical field is as follows:
the invention relates to the field of electronic product accessories, in particular to a PET liquid composite silica gel sheet and a preparation method thereof.
Background art:
with the continuous improvement of living standard of people, electronic products are required to be light and exquisite, and waterproof and dustproof. However, since the electronic product is assembled by parts, there are gaps outside the parts, for example, positions such as a microphone, a charging plug, and a camera of a mobile phone, so that the electronic product cannot be waterproof, and there are risks such as circuit damage due to water inflow in daily use. Therefore, a producer fills the joint positions of the electronic product parts by adopting the compression-molded silica gel strip to realize water prevention.
However, the existing waterproof silica gel strips are all ribbed, so that the production process of the silica gel strips is complicated, and the silica gel strips are required to be subjected to compression molding by an oil press and then to be subjected to manual punching in the later period. In addition, when assembling electronic product spare part, also need artifical to pasting installation silica gel strip, it can't realize automatic to pasting, and the packaging efficiency is low.
In view of the above, the present inventors propose the following.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provides a PET liquid composite silica gel sheet and a preparation method thereof.
In order to solve the technical problem, the invention adopts the following first technical scheme: the PET liquid composite silica gel sheet comprises a PET original film and liquid silica gel coated on the surface of the PET original film, wherein the liquid silica gel comprises the following raw material components in parts by weight: 980 portions and 1020 portions of silica gel-based glue; 8-10 parts of hydrogen-containing silicone oil; 2-4 parts of color paste; 0.4-0.6 part of inhibitor; 2.5-3.5 parts of platinum catalyst; and the PET original film is coated with a layer of treating agent, and the liquid silica gel is coated on the treating agent and is adhered to the surface of the PET original film under the action of the treating agent.
Further, in the above technical scheme, a protective film is covered on the surface of the liquid silica gel, and the protective film is a transparent release film; the treating agent is an adhesive with the model of CL-24S-202-32.
Further, in the above technical scheme, the liquid silica gel comprises the following raw material components in parts by weight:
further, in the above technical scheme, the liquid silica gel comprises the following raw material components by weight:
further, in the above technical scheme, the liquid silica gel comprises the following raw material components by weight:
in order to solve the above technical problem, the present invention adopts the following second technical solution: the preparation method of the PET liquid composite silica gel sheet comprises the following steps: preparing liquid silica gel: weighing silica gel-based glue, hydrogen-containing silicone oil, color paste, an inhibitor and a platinum catalyst according to the parts by weight, putting the silica gel-based glue, the hydrogen-containing silicone oil, the color paste and the inhibitor into a stainless steel barrel of a mixer, and mixing and stirring uniformly; then adding a platinum catalyst, synchronously vacuumizing a stainless steel barrel, stirring for 10 minutes, stopping vacuumizing for 10 minutes, and preparing liquid silica gel; then, solidifying the prepared liquid silica gel into a hardness block, and testing the hardness; after the hardness test is qualified, the next procedure can be carried out; treating a PET original film: preparing a PET (polyethylene terephthalate) original film, wherein a transparent release film is covered on one surface of the PET original film, testing the thickness of the PET original film, uniformly coating a treating agent on the other surface of the PET original film by using a coating machine after the thickness is detected to be qualified, performing an adhesion effect, keeping the thickness of the coating layer at 0.01-0.03 mm, baking and drying, and adjusting the baking temperature to 100 ℃; coating treatment: uniformly coating the liquid silica gel on the surface of the PET original film covered with the treating agent by adopting coating equipment; conveying the PET original film coated with the liquid silica gel to a tunnel oven for baking to integrally fix the liquid silica gel on the surface of the PET original film to prepare a PET liquid composite silica gel sheet; after entering a tunnel oven, tearing off the transparent release film on the surface of the PET original film by using a film tearing machine; winding: a coating winder is adopted to coat a layer of protective film on the surface of liquid silica gel in the PET liquid composite silica gel sheet, and a scraper is used to stick the protective film on the surface of the liquid silica gel to ensure that the protective film and the liquid silica gel are stuck flat without folds and bubbles; finally, trimming and trimming the PET liquid composite silica gel sheet pasted with the protective film; and then the coiled material is coiled into the PET liquid composite silica gel sheet coiled material.
Further, in the above technical scheme, when testing the hardness, a small cup of stirred liquid silica gel is taken and made into a hardness block with the thickness of 2mm, 9 blocks are made at one time, and 3 blocks are superposed to test the hardness, and 3 groups are tested in total; hardness range: shore A:15 ° + 4/-2.
Further, in the technical scheme, when the thickness of the PET original film is tested, the thickness gauge and/or the two-dimensional measurement is used, at least 5 points are tested each time, and the next procedure can be carried out after all the points are qualified.
Further, in the above technical solution, the tunnel oven has 8 sections of drying tunnels, and the temperatures of the 8 sections of drying tunnels are: the method comprises the following steps of (1) drying the material at 100 +/-5 ℃, 115 +/-5 ℃, 120 +/-5 ℃, 130 +/-5 ℃ and 130 +/-5 ℃, wherein the speed of a belt of a front 5-section drying tunnel is adjusted to be 8, the material is baked through a 5-section drying tunnel, a transparent release film is torn off and collected by a material collecting shaft, the tension of the material collecting shaft is 15-20, and the speed is 12-20; the belt speed of the back 3 sections of drying channels is adjusted to 10, and the material is exposed and passes through the oven until the material is finally received.
Further, in the above technical scheme, the liquid silica gel comprises the following raw material components in parts by weight: 980 parts of silica gel-based adhesive; 8 parts of hydrogen-containing silicone oil; 3 parts of color paste; 0.4 part of inhibitor; 2.5 parts of a platinum catalyst; or, the liquid silica gel comprises the following raw material components in parts by weight: 1000 parts of silica gel-based adhesive; 9 parts of hydrogen-containing silicone oil; 3 parts of color paste; 0.5 part of inhibitor; 3 parts of a platinum catalyst; or, the liquid silica gel comprises the following raw material components in parts by weight: 1020 parts of silica gel-based glue; 10 parts of hydrogen-containing silicone oil; 2 parts of color paste; 0.6 part of inhibitor; 3.5 parts of platinum catalyst.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects: the PET liquid composite silica gel sheet is formed by compounding and fixing the PET original film and the liquid silica gel, has ideal characteristic effects of hardness, tensile strength, tearing strength, elongation at break and the like, and can achieve excellent waterproof effect. The PET liquid composite silica gel sheet can be directly stamped and attached by equipment, is simple to process, realizes automatic attachment, does not need manpower, has high assembly efficiency, and can ensure the assembly quality. Compared with the traditional silica gel strip, the PET liquid composite silica gel sheet has the advantages of simple preparation method and production process, realization of full-automatic production and extremely high production efficiency and productivity. In addition, the PET liquid composite silica gel sheet can form a coiled material, the size of the coiled material can be cut according to requirements, the traditional silica gel strip is not required to be prepared by a specific mould, the size is not adjustable, the use is very inconvenient, and the PET liquid composite silica gel sheet with the coiled material structure is convenient to store, carry and the like.
Description of the drawings:
FIG. 1 is a structural diagram of the PET liquid composite silica gel sheet of the present invention.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific embodiments and the accompanying drawings.
Example 1:
as shown in fig. 1, the PET liquid composite silica gel sheet includes a PET original film 1 and a liquid silica gel 2 coated on the surface of the PET original film 1, wherein the liquid silica gel 2 includes the following raw material components in parts by weight:
the PET original film 1 is coated with a layer of treating agent, and the liquid silica gel 2 is coated on the treating agent and is adhered to the surface of the PET original film 1 under the action of the treating agent. The treating agent can fix the liquid silica gel 2 and the PET original film 1 into a whole, does not delaminate, and can effectively improve the waterproof performance.
The surface of the liquid silica gel 2 is covered with a protective film 3, and the protective film 3 is a transparent release film; the treating agent is an adhesive with the model of CL-24S-202-32.
The liquid silica gel 2 comprises the following raw material components in parts by weight:
the material number of the silica gel-based adhesive is TYL-6418/15-W; the material number of the hydrogen-containing silicone oil is HX-1008; the material number of the color paste is HX-3802; the material number of the inhibitor is HX-2028; the platinum catalyst has the material number of HX-5058.
The preparation method of the PET liquid composite silica gel sheet comprises the following steps:
preparation of liquid silica gel 2: weighing silica gel-based glue, hydrogen-containing silicone oil, color paste, an inhibitor and a platinum catalyst according to the parts by weight, putting the silica gel-based glue, the hydrogen-containing silicone oil, the color paste and the inhibitor into a stainless steel barrel of a mixer, and mixing and stirring uniformly; then adding a platinum catalyst, synchronously vacuumizing a stainless steel barrel, stirring for 10 minutes, stopping vacuumizing for 10 minutes, and preparing the liquid silica gel 2, wherein the process of vacuumizing twice is used for completely discharging bubbles in the liquid silica gel 2 and ensuring the quality of the prepared liquid silica gel 2; then, curing the prepared liquid silica gel 2 into a hardness block, and testing the hardness, specifically, when testing the hardness, taking a small cup of stirred liquid silica gel, making the liquid silica gel into a hardness block with the thickness of 2mm, making 9 blocks at one time, and superposing the 3 blocks to test the hardness, wherein 3 groups are tested, the test is reasonable and rigorous, and the tested qualified product is higher; hardness range: shore A:15 ° + 4/-2; after the hardness test is qualified, the next procedure can be carried out;
treating a PET original film 1: preparing a PET (polyethylene terephthalate) original film 1, wherein a transparent release film is coated on one surface of the PET original film 1, testing the thickness of the PET original film, measuring by using a thickness gauge and/or a two-dimensional element when testing the thickness of the PET original film, at least checking 5 points each time, and entering the next procedure after all the PET original film is qualified; after the thickness is detected to be qualified, uniformly coating the treating agent on the other surface of the PET original film 1 by using a coating machine to play a role in bonding, keeping the thickness of the coating at 0.01-0.03 mm, and baking and drying, wherein the baking temperature is adjusted to 100 ℃;
coating treatment: uniformly coating the liquid silica gel 2 on the surface of the PET original film 1 covered with the treating agent by adopting coating equipment; conveying the PET original film 1 coated with the liquid silica gel 2 to a tunnel oven for baking, so that the liquid silica gel 2 is integrally fixed on the surface of the PET original film 1 to prepare a PET liquid composite silica gel sheet; after entering a tunnel oven, tearing off the transparent release film on the surface of the PET original film 1 by using a film tearing machine; the tunnel oven is provided with 8 sections of drying tunnels, and the temperature of the 8 sections of drying tunnels is as follows in sequence: the method comprises the following steps of (1) drying the material at 100 +/-5 ℃, 115 +/-5 ℃, 120 +/-5 ℃, 130 +/-5 ℃ and 130 +/-5 ℃, wherein the speed of a belt of a front 5-section drying tunnel is adjusted to be 8, the material is baked through a 5-section drying tunnel, a transparent release film is torn off and collected by a material collecting shaft, the tension of the material collecting shaft is 15-20, and the speed is 12-20; the belt speed of the drying channel in the last 3 sections is adjusted to 10, the material is exposed and passes through an oven until the material is finally received, and the quality of the prepared product is ensured; the purpose of adopting the temperature change of 8 sections of drying tunnels is as follows: the reason for the temperature increase: this is a cross-linking process, which is specifically: the process comprises the steps of primary vulcanization, intermediate vulcanization and final vulcanization, wherein the product is liquid, the temperature is high at the beginning, and the product is easy to wrinkle and uneven, so that the product is not easy to wrinkle and is flat after forming.
Winding: a coating winder is adopted to coat a layer of protective film 3 on the surface of liquid silica gel 2 in the PET liquid composite silica gel sheet, and a scraper is used to stick the protective film 3 on the surface of the liquid silica gel 2 to ensure that the two are stuck flat and cannot have wrinkles or bubbles; finally, trimming and trimming the PET liquid composite silica gel sheet pasted with the protective film 3; and then the coiled material is coiled into the PET liquid composite silica gel sheet coiled material.
The density of the PET liquid composite silica gel sheet is 1.18g/cm3The thickness is 0.52mm, the hardness is 16 degrees, the tensile strength is more than or equal to 3.4Mpa, the tearing strength is more than or equal to 3.6KN/m, the elongation at break is more than or equal to 500 percent, the high temperature resistance is 200 ℃, and the low temperature resistance is-40 ℃.
The PET liquid composite silica gel sheet is formed by compounding, fixing and molding the PET original film 1 and the liquid silica gel 2, has ideal characteristic effects of hardness, tensile strength, tearing strength, elongation at break and the like, and can achieve excellent waterproof effect. The PET liquid composite silica gel sheet can be directly stamped and attached by equipment, is simple to process, realizes automatic attachment, does not need manpower, has high assembly efficiency, and can ensure the assembly quality. Compared with the traditional silica gel strip, the PET liquid composite silica gel sheet has the advantages of simple preparation method and production process, realization of full-automatic production and extremely high production efficiency and productivity. In addition, the PET liquid composite silica gel sheet can form a coiled material, the size of the coiled material can be cut according to requirements, the traditional silica gel strip is not required to be prepared by a specific mould, the size is not adjustable, the use is very inconvenient, and the PET liquid composite silica gel sheet with the coiled material structure is convenient to store, carry and the like.
Example two:
the second embodiment is different from the first embodiment in that: the liquid silica gel 2 is different in raw material components, and specifically, the liquid silica gel 2 comprises the following raw material components by weight:
the density of the PET liquid composite silica gel sheet is 1.18g/cm3The thickness is 0.52mm, the hardness is 16 degrees, the tensile strength is more than or equal to 3.3Mpa, the tearing strength is more than or equal to 3.4KN/m, the elongation at break is more than or equal to 500 percent, the high temperature resistance is 200 ℃, and the low temperature resistance is-40 ℃.
Except for the above, the PET liquid composite silica gel sheet of the second embodiment is the same as the preparation method of the first embodiment, and achieves other technical effects as described in the first embodiment.
Example three:
the second embodiment is different from the first embodiment in that: the liquid silica gel 2 is different in raw material components, and specifically, the liquid silica gel 2 comprises the following raw material components by weight:
except for the above, the PET liquid composite silica gel sheet of the third embodiment is the same as the preparation method of the first embodiment, and achieves other technical effects as described in the first embodiment.
The density of the PET liquid composite silica gel sheet is 1.18g/cm3The thickness is 0.52mm, the hardness is 16 degrees, the tensile strength is more than or equal to 3.4Mpa, the tearing strength is more than or equal to 3.5KN/m, the elongation at break is more than or equal to 500 percent, the high temperature resistance is 200 ℃, and the low temperature resistance is-40 ℃.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (10)
1. The utility model provides a compound silica gel piece of PET liquid which characterized in that: the PET film comprises a PET original film (1) and liquid silica gel (2) coated on the surface of the PET original film (1), wherein the liquid silica gel (2) comprises the following raw material components in parts by weight:
the PET original film (1) is coated with a layer of treating agent, and the liquid silica gel (2) is coated on the treating agent and is adhered to the surface of the PET original film (1) under the action of the treating agent.
2. The PET liquid composite silica gel sheet according to claim 1, characterized in that: the surface of the liquid silica gel (2) is covered with a protective film (3), and the protective film (3) is a transparent release film; the treating agent is an adhesive with the model of CL-24S-202-32.
3. The PET liquid composite silica gel sheet according to claim 1 or 2, wherein: the liquid silica gel (2) comprises the following raw material components in parts by weight:
4. the PET liquid composite silica gel sheet according to claim 1 or 2, wherein: the liquid silica gel (2) comprises the following raw material components by weight:
5. the PET liquid composite silica gel sheet according to claim 1 or 2, wherein: the liquid silica gel (2) comprises the following raw material components by weight:
6. a preparation method of PET liquid composite silica gel sheet is characterized by comprising the following steps: the preparation method comprises the following steps:
preparation of liquid silica gel (2): weighing silica gel-based glue, hydrogen-containing silicone oil, color paste, an inhibitor and a platinum catalyst according to the parts by weight, putting the silica gel-based glue, the hydrogen-containing silicone oil, the color paste and the inhibitor into a stainless steel barrel of a mixer, and mixing and stirring uniformly; then adding a platinum catalyst, synchronously vacuumizing a stainless steel barrel, stirring for 10 minutes, stopping vacuumizing for 10 minutes, and preparing liquid silica gel (2); subsequently, the prepared liquid silicone gel (2) is cured into a hardness block, and the hardness is tested; after the hardness test is qualified, the next procedure can be carried out;
treating a PET original film (1): preparing a PET (polyethylene terephthalate) original film (1), wherein a transparent release film is coated on one surface of the PET original film (1), testing the thickness of the PET original film, after the thickness is detected to be qualified, uniformly coating a treating agent on the other surface of the PET original film (1) by using a coating machine to play a role in bonding, keeping the thickness of the coating layer at 0.01-0.03 mm, baking and drying, and adjusting the baking temperature to 100 ℃;
coating treatment: uniformly coating the liquid silica gel (2) on the surface of the PET original film (1) covered with the treating agent by adopting coating equipment; conveying the PET original film (1) coated with the liquid silica gel (2) to a tunnel oven for baking, so that the liquid silica gel (2) is integrally fixed on the surface of the PET original film (1) to prepare a PET liquid composite silica gel sheet; after entering a tunnel oven, tearing off the transparent release film on the surface of the PET original film (1) by using a film tearing machine;
winding: a film-covered winding machine is adopted to cover a layer of protective film (3) on the surface of the liquid silica gel (2) in the PET liquid composite silica gel sheet, and the protective film (3) is pasted on the surface of the liquid silica gel (2) by a scraper, so that the two are guaranteed to be pasted flatly and cannot have wrinkles or bubbles; finally, trimming and trimming the PET liquid composite silica gel sheet pasted with the protective film (3); and then the coiled material is coiled into the PET liquid composite silica gel sheet coiled material.
7. The preparation method of the PET liquid composite silica gel sheet according to claim 6, characterized in that: when testing the hardness, taking a small cup of stirred liquid silica gel, making into a hardness block with the thickness of 2mm, making 9 blocks at one time, and superposing 3 blocks to test the hardness, and testing 3 groups in total; hardness range: shore A:15 ° + 4/-2.
8. The preparation method of the PET liquid composite silica gel sheet according to claim 6, characterized in that: when the thickness of the PET original film is tested, a thickness gauge and/or a two-dimensional element is used for measuring, at least 5 points are tested each time, and the next procedure can be carried out after all the PET original film is qualified.
9. The preparation method of the PET liquid composite silica gel sheet according to claim 7, characterized in that: the tunnel oven is provided with 8 sections of drying tunnels, and the temperature of the 8 sections of drying tunnels is as follows in sequence: the method comprises the following steps of (1) drying the material at 100 +/-5 ℃, 115 +/-5 ℃, 120 +/-5 ℃, 130 +/-5 ℃ and 130 +/-5 ℃, wherein the speed of a belt of a front 5-section drying tunnel is adjusted to be 8, the material is baked through a 5-section drying tunnel, a transparent release film is torn off and collected by a material collecting shaft, the tension of the material collecting shaft is 15-20, and the speed is 12-20; the belt speed of the back 3 sections of drying channels is adjusted to 10, and the material is exposed and passes through the oven until the material is finally received.
10. The method for preparing the PET liquid composite silica gel sheet according to any one of claims 6 to 9, wherein the method comprises the following steps: the liquid silica gel (2) comprises the following raw material components in parts by weight: 980 parts of silica gel-based adhesive; 8 parts of hydrogen-containing silicone oil; 3 parts of color paste; 0.4 part of inhibitor; 2.5 parts of a platinum catalyst; or the liquid silica gel (2) comprises the following raw material components in parts by weight: 1000 parts of silica gel-based adhesive; 9 parts of hydrogen-containing silicone oil; 3 parts of color paste; 0.5 part of inhibitor; 3 parts of a platinum catalyst; or the liquid silica gel (2) comprises the following raw material components in parts by weight: 1020 parts of silica gel-based glue; 10 parts of hydrogen-containing silicone oil; 2 parts of color paste; 0.6 part of inhibitor; 3.5 parts of platinum catalyst.
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